I don't know the exact answers..
But for weekly, the CCV cabins are about 200 points less than the Poly bungalows.
For example, a week now in mid September..
Copper Creek cabin -- 639 points (studio 107)
Poly Bungalow -- 841 (lake view studio, 148)
I don't know how often they are left empty in comparison, but there are more cabins at CCV than there are bungalows. I believe it's 26 Cabins compared to 20 Bungalows.
Interesting comparison -- a 2 bedroom at BLT -- theme park view is 368. 3 bedroom Grand Villa lake view, 618.
So right now.. it's about the same points for a 3 bedroom Grand Villa at BLT, with access to the monorail, sleeps 12, etc.. as the 2 bedroom cabin at CCV (which certainly has some advantages, a beautiful cabin with a hot tub... but only sleeps 8, no monorail). I can certainly see why people wouldn't be flocking to the CCV cabin or the Poly Bungalow.
I do think we will see a gradual re-evaluation of the points over the next several years to bring things more into balance.